DATA  FW04P17; TITLE 'CHAPTER 4 PROBLEM 17';
INPUT HALFLIFE;
CARDS;
    2.50
    2.20
    1.60
    1.30
    1.20
    1.60
    2.20
    2.20
    2.60
    1.00
    1.50
    3.15
    1.44
    1.26
    1.98
    1.98
    1.87
    2.31
    1.40
    2.48
    2.80
    0.69